This is a completely re-designed exhaust gasket(designed with my assistance!)...it fits both 16V and 20V heads, the mounting holes have been MOVED in relation to the ports to allow the port roof to be ported! Priced @ 1/3 the cost($34.00) of the Toda, or Tomei - http://www.sv3power.com/store/index.php ... cts_id=217